Loads imported from LBS to substructure design/analysis

My previous 3-span steel superstructure worked fine. No problems. Now I'm working on a single span steel bridge, and when I open substructure design/analysis there are no values for live loads... all zeroes. And it won't let me generate them. All other loads are imported properly. Anyone know what's going on? I've tried everything. I even started over with a completely new file but got the same results. The live load reactions show up in superstructure so I know they've generated.... just not being exported to substructure...